Rolling window-screen.



J. L. C'ABRAL.

BQLLING WINDOW SCREEN. 1 APPLICATION TILED JAN. 12. 1911.

997,600. Patented July 11, 1911.

W @358 Zambia}. M

/ To all whom it may concern:

UNITED STATES PATENT OFFICE.

mssE LAWRENCE oABRAL oF, sou'rn EASTON, MASSACHUSETTS:

ROLLING WINDOW-SCREElV'.

Be it known that I, Jnssn L. CABRAL, a citizen of the United States, and resident of South Easton, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Rolling Window-Screens, of which the following is a specification.

This invention relates to improvements 1n rolling window screens of the class in which the screen cloth is wound upon a roll, and said roll moved up or down in the window casing to .lay the screen over the window opening and remove the same therefrom.

The object of my invention is to provide a guide over. which the screen is led in passing to and from the roll so that the screen will lie close against the window sash when the screen roll registers with the sash.

A further object of my invention is to reduce the cost of construction of the device,-

and to provide guide rods which in addition to guiding the screen cloth, also extend beneath the racks on either side to hold the gears in mesh therewith.

It is found in the practical use of devices of this character that where the screen leads direct from the roll without a guide to control its laying, that the roll when raised and approaching its upward limit is reduced in size, due to the unwinding of the screen therefrom, causing the screen to hang off and leave a space between it and the sash, the more the roll is unwound the greater the space, thereby permitting insects to freely passthrough the opening into the house, dofeating the very purpose of the screen.

With these and other objects in view, the

invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings: Figure 1 isaperspective view showin the roller screen applled to a window. Fig. 2 is a section on line 2-2 of Fig. 3 looking downward. Fig. 3- is a section on line 3-3 of Fig. 2. Flg. 4 is a detail perspective view of the roll casing. Fig. 5 is a perspective .view showing a detail construction of the means for securing the lower edge of the screen cloth to the window casing. Fig. 6

. is a perspective view illustrating a portion of one of the racks with one of the gears engaging the same. Fi 7 is aerspect1ve View showing a mo ificatlon 0 one of Specification of Letters Patent.

Application filed January 12, 1911.

Serial No. 602,219.

the end plates illustrating the same as having an ear on one edge for the reception of one end of the guide rod, and an outwardly extending lug on the opposite edge to pass under the rack and assist in holding the gear in mesh therewith.

Referring to the drawings, 1 designates the window frame or casing to which the device is operatively attached.

2' is the lower window sash and 3 the bottom rail thereof.

7 The screen roll proper 4 is constructed of a thin metal cylinder 5 having heads 6-6 at either end. Extending through this cylinder and journaled in its heads is a small central shaft 7. At each end of this cylinder are plates 8-8 provided with central bearings 99 for the shaft 7. The inner opposite corners of these plates are provided with outwardly extending cars 10 and 11 through which extend the rods 12 and 13 respectively. These rods serve a number of purposes. First, they connect the plates together. Second, the ends 14 of these-rods extend out beyond the plates and beneath the rack, hereinafter described, to prevent said plates from rotating and also to prevent the plates from rising and to hold the gear, presently described, in mesh with its rack. The ends of this shaft 7 extend through the bearings 99 and are flattened as at 16 to receive and be secured to the gears 15-15.

The metal cylinder is under the winding tension of a coil spring 17, one end 18 of which is fixed to the cylinder wall while the opposite end 19 is fixed to the shaft 7, the screen clot-h 20 being Wound u Patented July 11-, 1911;

automatically on this roll under tenslon of this spring, similar to that of an ordinary curtain.

Long bearing strips 2121 extend out laterally from either side of the window casing against which strips the edgesof the screen are laid. One portion of these strips is bent outward as at 22 to lie against the window casing, the outer edge of which portion is bent over and back as at 23 upon the angle flange portion 24 of the rack 25, both the rack and the bearing strips being held in position by a single set of screws 26, the rack being above, parallel with and spaced apart from the bearing strips 21 into which space enters the ends of the rods 12 and 13 to retain the gear 15 in mesh with this rack as above mentioned. The whole of the roll mechanism, including that portion of the screen wound thereon, is inclosedwithin a sheet metal casing 27, see Fig. 4, the lower edges 28 and 29 of which are bent around the rods 12 and 13 to firmly hold this casing in position.

In applying my improved device to a window casing it is necessary to first secure the bearing strips 21 and racks 25 in position on the casing. The roll, after being assembled and the screen cloth wound thereon, is passed down over the upper ends of the rack 25, the outwardly projecting ends of the rods 12 and 13 extending beneath said rack to hold the teeth of the gears in mesh with those of the rack. The lower end of the screen cloth is then drawn ut from the roll and fastened to the bottom of the casing or sill by means of the clamping strip 30, see Fig. 5. The tension of the coil spring 17 on the inside of the roll has a tendency to turn the gears to the right and cause the roll to ascend, thereby counter-balancing the weight of the mechanism and the screen cloth wound thereupon, by which construction the roll will stay in any position without further fastening.

A feature of my invention is the construction of the end plates 8-8 having outwardly extending ears through which the guide rods 12 and 13 extend. Said rods as above explained perform the function firstof connecting the plates together; second, the ends of the rod extend beneath the racks to prevent these plates from rotating; third, the lower rod 13 forms a guide over which the screen cloth is drawn to hold the same closely up against the lower rail of the window sash; and fourth, these rods serve to hold the casing 27 in position as the lower edges of said casing are bent around the same.

I claim:

1. A roller window screen comprising a spring actuated roll adapted to be moved up and down in the window casing, said roll adapted to be moved independent of the sash, a rack and gear gooperating' with said roll, a screen wound onto said roll and a guide over which said screen is led in passing onto and leavin said roll to lay said screen close to the window sash, the ends of said screen guide extending beneath said rack to also assist in keeping said gear in mesh with said rack.

2. A roller window screen comprising a spring actuated roller on which the screen is wound, a rack, and pinion cooperating with said roll when the same is raised and lowered in the window frame, a plate at each end of said roll, a pair of rods connecting said plates, the ends of one or both of said rods extending beneath said rack to engage the same and prevent said plates from rotating when the roll is revolving, to keep the gear in mesh with'its rack.

In testimony whereof I aifix my signature in presence of two witnesses.

JESSE LAWRENCE CABRAL.

Witnessesz' V HOWARD E. BARLOW, E. I. OGDEN.

and al so" 

